This means that each time you run now, you get a new deployment (rather than updating an existing one). Its URL will be copied to your clipboard automatically, letting you share it right away.

This basically provides our users with a secure sandbox right before the production level. Why?

Avoids bugs from getting dragged onto production

Allows you to share the changes with testers around the globe using a unique unguessable URL

Simulates the production enviroment exactly

Several optimizations are in place to make deploying virtually instant

As you can see, staging your application before "moving it" to production using now alias comes with many neat benefits. Therefore, it's generally a good practise to take advantage of this functionality!